Which linguistic device is primarily responsible for making Apple's 'Think Different' slogan so memorable and effective?

Advertising slogans are carefully crafted linguistic gems that employ various language techniques to become memorable and effective. The best slogans use phonological, syntactic, and semantic features that make them stick in our minds. This trivia tests your knowledge about the linguistic devices that have made certain advertising slogans particularly successful in language markets worldwide.

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Grammatical deviation (using an adjective 'different' where standard grammar would require an adverb 'differently')
Alliteration (repetition of initial consonant sounds)
Rhyming couplet (matching sound patterns at the end of phrases)
Imperative mood with a superlative adjective